Cable-clamp and bridle-ring



H W. PLEISTER AND J. KARITZKY. CABLE CLAMP AND BRIDLERING.

APPLICATION FILED AUG.I7,19v20 1,365,626.- I v Patented Jan. 11,1921.

' UNITED STATES PATENT OFFICE;

HENRY W. PLEISTER, OF WESTFIELD, AND JOHN KARITZKY, OF GARWOOD, NEW TJERSEY, ASSIGNORS TO HENRY B. NEWI-IALL, EXECUTOR OF HENRY B. NEWHALL,

SR., DECEASED..

CABLE-CLAMP AND BBIDLE-RING.

Specification of Letters Patent. Patented J an. 1 1, 1921.

Original application filed October 4, 1919, Serial No. 328,530. Dividedand this application filed August 17, 1920. Serial No. 404,164.

To all whom it may concern Be it known that we, HENRY V. PLEIs'rEn, acitizen of the United States, residing at "Vestfield, in the county ofUnion and State of New Jersey, and Jor-iN KARITZKY, a citizen of theUnited States, residing at Garwood, in the county of Union and State ofNew Jersey, have invented certain new and lilseii'ul Improvements inCable-Clamps and Bridle-Rings, of which the following is aspecification, taken in connection with the accompanying drawings.

This application is a division of our parent application Ser. No.328530, filed October 4th, 1919.

Our invention relates to a combined conduit and cable clamp and bridlering, and also to the cable or conduit clamp as a subcombination orarticle of manufacture.

Our invention further relates to a cable and conduit clamp which can bemanufactured at minimum expense and to which a bridle ring may besecured either at the original installation of the cable and conduitclamp, or at any future time when it may be desirable to, support one ormore runs of bridle wire. It further relates to the combination of aconduit and cable clamp and a bridle ring which .is' unthreaded, andwhich will form a complete closed loop around the bridle wire or strandsof bridle wires, and thereby prevent any acci dental disengagement ofthe bridle wire from the bridle ring.

Our invention further relates to certain combinations, sub-combinations,articles of manufacture, and details of construction all of which willbe more fully hereinafter described and pointed out in the claims,

In the figures, in which we have shown different embodiments of ourinvention, the same reference numerals refer to similar parts in theseveral figures.

Figure 1 is a perspective view of our combined cable clamp and bridlering, the bridle ring being shown in its first attaching position.

Fig. 2 is a perspective view of the preferred form of bridle ring.

Fig. 3 is a perspective view, similar to Fig. 1, but showing the bridlering fully attached to the conduit or cable clamp and supporting runs ofbridle wires.

Previous to our invention bridle ringshave been used with conduit andcable clamps. These bridle rings are what are known as pig-tail, havingone of their ends provided with machine screw threads to cooperate withmachine female screw threads in the heel of the cable clamp. Thishasnecessitated an extra thickness of metal in the heel of the conduitor cable clamp so as to provide sufficient female threads to support theshank of the commercial pigtail bridle ring. hen the cable clamp wasformed of sheet metal the customary way to get this additional thicknessof metal in the heel was to bend over sufiicient additional metal todouble the thickness of the metal in the heel; This necessitated the useof a large additional quantity of sheet metal with the consequentincrease in cost of the resulting cable or conduit clamp.

In the commercial use of conduit and cable clamps it is not generallypossible, at the date of the original installation, to determine whetheror not bridle rings will be needed to support additional loose strandsof bridle wires. In commercial practice, a cable is supported on a wallor other suitable support and it may be weeks, months, or years laterthat the telephone engineers will determine that it is desirable tosupport bridle wires parallel to the cable.

By our invention our conduit and cable clamp may be used as a separatearticle of manufacture or sub-combination, and then later, when theneeds of the service demand it, our bridle ring may be supported by thesame conduit or cable clamp, when the complete combination would beused.

By our invention we form our cable clamp 1 preferably of sheet metal andprovide it with a hook 2 and heel 3, both of the same minimum thickness,so as to reduce the cost of manufacture.

The cable and conduit clamp 1 is used to support the cable 4 in theordinary manner against a wall or other support by the securing screw 5.eeks, months, or years later, when it may be desirable to increase theservice by stringing additional wires, this may be accomplished atminimum expense by our invention, by attaching our bridle ring 6, havingthe arms 7, 8 to the bearings, 9, 9 of the conduit or cable clamp 1.This can be easily done by placing the arm 7 in one of the bearings 9,for example, and then compressing the bridle ring 6 so that the otherarm 8 will spring into the other bearing 9, as shown in Fig. 1. Thebridle wires 10, 10 can then be strung through the bridle ring 6, Fig.3. The bearings 9, 9 are preferably formed at a point removed from theend 11 of the heel or base 3. They are preferably formed by cutting orslotting the heel or base, at a point removed from the end 11, andbending the metal so cut, as shown in Figs. 1, 3 and 4.

Our invention can also be used as a twohole conduit or cable clamp. InFigs. 5 and 6 we have shown a two-hole conduit or cable clamp 12-,having a hook portion 102 supporting the cable 4. This clamp is securedin position by the two screws 18, 13 passing through the two holes 1 1,1%.

This two-hole conduit or cable clamp is provided with bearings 109, 109formed in the same manner as the bearings 9, 9 of the otherconstruction.

It will be noted that in our improved construction there is but oneminimum thickness of metal in the heel of the conduit or cable clamp;that no tapping or screw threading of the heel is required; that noscrew threads on the bridle ring are necessary or desirable; that muchthinner and lighter wire can be used to form our bridle ring than can beused in the ordinary commercial form of pig-tail bridle ring; and that aclosed loop is formed around the strands of bridle wires so that theycannot become disengaged from the bridle ring; and that our bridle ringcan, in both of our forms shown, be attached to the diliferent conduitor cable clamps without loosening the securing screw and by simplemanipulation.

Having thus described this invention in connection with illustrativeembodiments thereof, to the details of which we do not desire to belimited, what is claimed as new and what is desired to secure by LettersPatent is set forth in the appended claims:

1. A. conduit and cable clamp formed of sheet metal having a hookportion and a heel portion of one thickness of metal the heel portionbeing provided with two vertical cuts or kerfs and the metal of the heelportion being bent from the cuts or kerfs to the edge of the heelportion to form two horizontal bearings for both ends of a bridle ring.

2. A conduit and cable clamp formed of sheet metal having a hook portionand a heel portion of one thickness of metal, the heel portion beingprovided at a point removed from its end with two bearings horizontallyalined with space between said bearings to receive two ends of acooperating spring bridle ring and a cooperating spring bridle ringhaving two oppositely extending horizontal arms adapted to be sprunginto said horizontal bearings.

HENRY W. PLEISTER. JOHN KARITZKY.

Witnesses:

MARY R. RYAN, ELIZABETH J. ROTH.

